Revert "Fix bogus %name-prefix option syntax in all our Bison files."

Tom Lane <tgl@sss.pgh.pa.us>

Commit: 2677bace522cae86fae899c58b58c11d7b45fd56
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2014-05-28T23:28:37Z
Releases: 9.3.5
Revert "Fix bogus %name-prefix option syntax in all our Bison files."

This reverts commit ece7aa8b0f57d92577055a88579555df895eb929.

It turns out that the %name-prefix syntax without "=" does not work
at all in pre-2.4 Bison.  We are not prepared to make such a large
jump in minimum required Bison version just to suppress a warning
message in a version hardly any developers are using yet.
When 3.0 gets more popular, we'll figure out a way to deal with this.
In the meantime, BISONFLAGS=-Wno-deprecated is recommendable for
anyone using 3.0 who doesn't want to see the warning.

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